I am really struggling here with a number of answers which I cannot justify - and I am also having problems with the jumbles. So I would appreciate any hints on the following
9a. I have a perfectly good solution which seems obvious, but the second word in the clue is redundant
16a Still cannot see this, despite various hints.
22a There is an obvious answer here, and it would fit the comment in the third sentence of preamble - but I cannot see a consistent way of entering this.
12d I think I have the answer, but I cannot see the wordplay.
21d I can deal with everything apart from the last word in the clue.